Geography of Guam

This article describes the geography of the United States territory of Guam.

Location
Oceania, island in the North Pacific Ocean, about a quarter of the way from the Philippines to Hawaii, United States
Geographic coordinates
13°26′31″N 144°46′35″E
Map references
Oceania
Area
  • Total: 544 km²
  • Land: 544 km²
  • Water: 0 km²
Area (comparative)
Three times the size of Washington, D.C.
Land boundaries
Approximately 30 miles (48 km) long and 9 miles (14 km) wide, narrowing to 4 miles (6.4 km) at the center.
Coastline
125.5 km (78.0 mi)
Maritime claims
Climate
Tropical marine; generally warm and humid, moderated by northeast trade winds; dry season from January to June, wet season from July to December; little seasonal temperature variation.
Terrain
Volcanic origin, surrounded by coral reefs; relatively flat coralline limestone plateau (source of most freshwater), with steep coastal cliffs and narrow coastal plains in north, low-rising hills in center, mountains in south. Soils are mostly silty clay or clay and may be gray, black, brown or reddish brown; acidity and depth vary.[2]
Elevation extremes
Natural resources
Commercial fishing (mostly servicing and unloading of longline fleets and commercial vessels), recreational fishing of Indo-Pacific Blue Marlin (Makaira mazara), Wahoo (Acanthocybium solandri), Mahi-mahi (Coryphaena hippurus), Yellowfin tuna (Thunnus albacares), and deepwater reef fish, tourism (especially from Japan but increasingly from China and South Korea).
Land use
  • Arable land: 1.85%
  • Permanent crops: 16.67%
  • Other: 81.48% (2012 est.)
Irrigated land
2 km2
Natural hazards
Frequent squalls during wet season; relatively rare, but potentially very destructive typhoons (typhoons are possible in any season but most common from August through December)
Environment - current issues
Extirpation of native bird population by the rapid proliferation of the Brown tree snake (Boiga irregularis), an exotic species. Island also supports feral populations of introduced deer, Pigs (Sus scrofa) and Carabao (Bubalus bubalis carabanesis).
Geography - note
Largest and southernmost island in the Mariana Islands archipelago; strategic location in western North Pacific Ocean.
Guam
Native name:
Guåhån
Map of Guam (See detailed map)
Geography
LocationPacific Ocean
Coordinates13°26′31″N 144°46′35″E
ArchipelagoMariana Islands
Area544 km2 (210 sq mi)
Length51 km (31.7 mi)
Width15 km (9.3 mi)
Highest elevation406 m (1,332 ft)
Highest pointMount Lamlam
Administration
TerritoryGuam
Largest settlementDededo (pop. 46,000)
Demographics
Population167,358 [1] (July 2017 est.)
Pop. density320.44/km2 (829.94/sq mi)
Ethnic groupsNative Chamorros (57%), Filipino (25.5%), White (10%), Chinese, Japanese and Korean ancestry

Extreme points

This is a list of the extreme points of Guam, the points that are farther north, south, east or west than any other location.

References
  1. The World Factbook: Guam CIA. Retrieved on October 18, 2017.
  2. https://casoilresource.lawr.ucdavis.edu/gmap/
  3. "Elevations and Distances in the United States". U.S. Geological Survey. 29 April 2005. Retrieved November 9, 2006.
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